I bought this to replace my last one it started going out. I was thinking about getting a zappco that's what i had. I went with this because it was cheap looked clean n had good reviews on other sites as well. Over all im extremely pleased with cadence it has smooth response when twisting the knobs no scratching noise. I did a short ground and didn't get any engine noise all of the adjustment sound clear. I'll recommend this to anyone looking for a simple equalizer that controls not only just the volume but pitches of mids highs n lows as well as sub woofer frequency and volume